uhlmann



2 Sheets-Sheet I.

(No Model.)

C. R. UHLMANN.

LOCK.`

No. 347,664. Patented Aug. 17, 1886.

(No Mndel.) 2 Sh6ets-Sheet 2.- G. R. UHLMANN.

y Loox. No. 347,664. Patented Aug. 17, 1866.

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. CHARLES R. UHLMANN, OF PEORIA, ILLINOIS.

LOCK.

SPECIFICATION forming part f Letters Patent No. 347,664, datec'l August17, 1886.

Application tiled June 28, 1886. Serial No. 206,437. (No model.)

To all whom it may concern:

Be it known that I, CHARLES It. UHLMANN,

of Peoria, in the county of Peoria, Sta-te of Illinois, have invented anImproved Safety- Lock; and I do hereby declare that the follow-V ing isa full,clear and exact description thereof.

The object of this invention is the construction of an improved devicefor enabling the bolt ofwhatis termed a rim-lock to be so fastened fromwithin the compartment as to be rendered incapable of being unlockedfrom the outside.

My invention for this purpose consists, essentially, of a block adapted,when the bolt is protracted, to be moved forward and partially cover thekey-hole, preventing the withd rawal of the key, and at the same. timeabutting against project-ions or shoulders on the bolt to keep the samefrom being unlocked, means being provided for fastening said block insuch position.

In the drawings connected with this application, Figures l and 2 areviews of thein-v terior of a lock,showing the boltin its two po-A blockand means for securing the same. Fig. 7 is a sectional view at x x inFig. 6.4 Fig. 8 is a view of a modification of the lock. Fig.

. 9 is an elevation of securing-block; Fig. I0,

a View of the button and finger.

In the drawings, L is the lock-case having its side piate removed. D isthe bolt. Mis the key, and N is the key-hole.

The block A, which I rterm the securingblock,77 is formed with thesloping face C for engaging with the key M, as shown in Fig. 2, and alsois provided with the lug or lugs B, which, by abutting against theshoulders D on the bolt D, serve to hold the latter in its protractedposition when the block is fastened iorwa-rd, as shown in Fig. 4. Twolugs,B,are usually formed on the securing-block, between which lies thelower edge of the tail ofthe bolt, so that saidlugs shall engage with ashoulder on each side of the bolt, and thus assist in :holding thelatter in place. On the under side of the securingblock is a rib, A2,projecting through a slot iu the lower rim, L', of the lockcase; andtransversely through said rib below said rim is inserted a small pin, A,the securing-block is kept from rising from its place. Y

I sometimes prolong the rib A some distance forward, as shown in Figs. land 2, and have a projection, B', extend from the end thereof up througha slot in the rim L of the lockcase. A lug, D2, below the bolt D, ismet'by this projection B', which assists 'in preventing the bolt frombeing retracted when the securing'block Ais fastened forward.Asindicated Vin Figs. 6 and 8, the said rib AZ can be dispensed with andthe securing-block A permitted to rest upon the rim L', the tail of thebolt D keeping said block from being raised.

In using my safety-lock, the bolt D is iirst thrown into engagement withthe keeper in the door-jamb by means of the key M. The securingblock Aisthen moved forward until its lugs B meet the shoulders D of the bolt,and the sloping face C presses the key M to one side of the key-holel N,so that said key cannot be withdrawn. The securing-bolt being newfastened in its present position, the

`bolt D cannot be displaced nor the key removed by any means appliedfrom without the apartment. For thus fastening said se curing-bolt, Ihave devised several devices, among which are those displayed in Figs.l, 2, 6, and 8. y

ln Figs.1 and 2 the fastening device consists, essentially, ofthetumbling-block K, having a lug, K, adapted to engage with a notch, K2,in the arm A of the block A. A button, E, having stem E', extendingvertically' through the rear end of said arm A, enables the lug K ofsaid tumbling-block to be raised from said notch, and the securingblockA to be moved to its fastening position, which, when reached, ismaintained bythe dropping of said tumbling-block between the end of thearm A and the side rim of the lock-case. To unlock the door thetumbling-block K is raised in the same way by the button E, while thesecuring-block A is moved back.

Iu Fig. 8 the button E has its stem E pivotally attached to thesecuring-block A, and passes therefrom horizontally through a slot inthe side rim, L2. By swinging the button upward, the lug E2 of the stemE is disengaged from the lower end of the slot, so that by which lthestem and the securing-block A can be fastened in either of the twopositions.

My preferred construction, which is that shown in Figs. 6 and 7,consists in the button Il, having the stem E', on which is thelaterallyprojecting lugE. Said stem is vertically movable in an aperturethrough the arm A ofthe securing-block A, being kept from fallingtherefrom by a small cross-pin, E3. From the look-ease projects the bentfinger F, with which the lug comes iu Contact when the button E is inits lower position. By raising said button until said lug is just abovesaid finger, a side push on said button moves it and the securing-block.The button being allowed to drop at the other side of the finger, theinterference of the lug El and said finger holds the securing-block A inits new position.

The object in having the securing-block A fastened in iis nonseenringposition is that the same shall not be moved by thejarring of the door,and thereby cover the keyhole when not desired.

Instead of the iinger F and the lugs Ff', a projection, Ff, 'eau beformed ou the wall of the lockease for the engagement therewith of thepin E. The button E being raised to bring said pin above saidprojection, the securingblock can be moved,as before. This construetionis substantially the same as the arrangement of thelinger and lug, andboth construetions eau be employed at the saine time, if desired.

As shown in Fi". 9, there can be a short rib, A, formed beneath theseeuringbloek A, and across-pin, A3, put therein to aid in holding thesaid block in place on the rim L. The abutting ofthe rear end of saidrib against the stem E' of the button E strengthens the position of saidblock when holding the bolt I), by means of the finger F, and the lugEl. To keep the button E from being raised too high, I form the arm Awith the projections A, extending` over the upper end of the stem E ofthe button. \Vhen said button is raised to enable the stem to clear thefinger F, the up per end of said stern meets said projections, and isthereby made to remain at the proper point. I prefer this stop, ratherthan the lug Iii and its contact with the under side of the lock-case,on account of the friction resulting from this latter way, and theconsequent less ease of moving the securing-block.

'What I elai m as my invention, and for which I desire Letters Patent,is as follows, to wit:

l. In a lock, the combination,with the ease and the bolt, of thesecuring-block A, adapted to engage with said bolt and having thesloping face C for securing the key, and a fastening for said block, forthe purpose specified.

2. In a lock, the combination, with the ease and the bolt D, having theshoulders D', ofthe securing-block A, having the lugs B, adapted toengage with said shoulders, and formed with the sloping face C for securing the key, and the button adapted, substantially as set forth, forfastening said securing-block, for the purpose specified.

3. In a lock, the combination, witlrthe case andthe bolt, ofthehorizontallymovable securing-bloek adapted to engage with the bolli, andthe vertically-movable button adapted, when raised, to permititselfaudthe said block to be moved, but when dropped t0 fasten thesame, substantially as described.

4. rIhe combination, with the lock-case and the bolt, of thesecuring-block adapted to en gage with the bolt, and having the arm A',the button having stem vertically movablein said arm,and having thelug5'* and the ii nger F projecting from the loek-case, substantially asset forth.

5. The combination, with the lock-caseand the bolt having the shouldersD, of the seeur ing-block A, formed with the lugs B, the slop ing faceC,and the arm A', the button IIhaviug stem "movable in said arm, andhaving a projection engaging with a projection from the ease,substantially as and for the purpose specified.

In testimony that I claim the foregoinginvention I have hereunto set myhand this 24th day of June, inthe year 1886.

CHARLES R. UHLMANN.

Vitnesses:

A. B. UPHAM, A. KnrrnLnY.

